Claude u



TYRRELL LAWN SPRINKLER HEAD Filed April 26, 1928 v 6W r2 9 I UNITED STA ES nATENroFFlcE f;

Patented Jan. 27, 19 31 C AU u. 'rvnRELt, V on "PASAQE'NA, onmro'nnm 'LAWN-SPRINKLERVHEAJ) 4 Application filed Api'i126,

My invention relates generally to a lawn sprinkling system andmore particularly to a "sprinkler'headthatis connected to the underground supplypipes and which occupies "a position just below the surface of the lawn, and whichhead in operation sprinkles or distributes water throughout a considerable area of the lawnadj acent to the head.

The principal objects of my invention are to generally improve upon and simplify'th'e construction of the existing forms of lawn sprinkler heads, to provide a head having a portion that includes the jet opening that is moveable vertically within housing ofthe head in order that when the head is in service, the jet opening thereof occupies a plane a short distance above the surface of the lawn so that grass or other "growth immediately adjacent to the head will in no wise interfere with the complete functioning of the device, and further, to provide a device of the character referred to that is relatively simple in construction, inexpensiveof manufacture and which will be very effective in performing the functions for which it is intended. The principal disadvantage of the ordinary forms of sprinkler' heads that'a're fixed to the underground supply pipes at the level of the lawn is, thatgrass growsover the topof the sprinkler head andimaterially interferes with the complete functioning thereof, and this is more particularly the. case where the heads are set or positioned so that their upper surfaces are positioned slightly below the surface of the lawn in order to permit a lawn mower to be operated directly over thetop of the head, andfit is the principalobject of my invention to provide a springlerhead' that normally occupies a positionjust below the surface of the lawn, and a portion of which head .is telescopically mounted within anotherportion, so that it willbe elevated by the pressure of the water passing thru the head during sprinkling 0pmovable portion of the head.

1928.. Serial 'N'o. 273,054.

erations, and thus, the spray or jet of water issuing from the head will discharge at a pointafew inches above the grass or turf that formsthelawn'; v

With the foregoing and other objects in' view, my invention consists in certain novel features of construction and arrangement of 7 parts that will hereinafter be more fully described and claimed and illustrated in the accompanying drawing,in which a- Figrl is a. top, plan view of a lawn sprinkler head of my improved construction. 1

r Fig. 2 is-a vertical section taken on the line 25-2 of Fig. 1, and showing the telescoping portion ofthe head in its normal'or lowered position. Y

. Fig. 3 is a vertical section similar j 2 and showing the telescoping portion of the headgin elevated position or the position it assumes while in service.

"Fig. 4 is ahorizontal section taken on'ithe' 1 line 14 of'Fig. 1.: 1 7

Referring'by numerals to the accompany ling drawingswhichillustrate a practical embodiment of ,my invention,- 10 designates a short, hollow, cylindrical'm'ember that forms the body' or housing of the head, and the lower end of said body is closed by a disc or plate 11 from which depends a centrally arranged plug 12 that is externally threaded in order that it may bescrew seatedin the internally threaded upper end of a vertically disposed pipe13, and which latter forms a part of the underground supply pipes. Formed thru plate 11 and plug 12 aperture 1 L. 7

7 Screw seated onthe upper end ofthe body 10, is a cap 15'provided with a centrally arranged aperture 16, and formed on the underside of said cap around said aperture, is a flat surface 17 that functions as a seat 17 for a packing ring or gasket that is carriedby the Arranged for sliding movement thru aperture 16 ,iS a tubular member 18, andformed in is an axially disposed 1 the periphery thereof, is a longitudinally disposed groove 19, and projecting into said groove, is the point of a pin or screw 20 that is seated in the cap 15, and which arrangement permits the tubular member 18 to move lengthwise and at the same time holds the same against rotary movement in either direction.

Carried by the lower end of tubular member 18, is a ring 21, the outer periphery of which has a working fit with the inner face of the Wall of the cylindrical member 10, and arranged on top of said ring 21, is a packing ring or gasket 22, preferably formed of rubber, leather or composition, and the upper surface of which is adapted to fit against the seat 17 when the telescoping portion of the head is elevated to its limit of movement.

The length of tubular member 18 is such that when the ring 21 rests on disc 11, a portion of said tubular member projects ashort distance above cap 15, and secured on said projecting upper end, is a substantially discshaped head 23 within which is formed a centrally arranged chamber 24 that communicates with the upper end of the bore or passage thru the tubular member 18, and leading from the upper end of said chamber 21,to the top surface of head 23, is a centrally arranged jet opening 25. j

The underface of head 23 is made concave, thereby producing at the lower, outer edge of said head, a marginal flange'26, which, when the telescoping portion of the device is at its lower limit of movement, rest-s directly upon top of the marginal portion of the cap15.

As a result of the construction just described, the rib or flange 26 will, when the head 23 returns to its normal position, bear downwardly upon any blades of grass that might overlie the top of cap 15while the telescoping portion of the device iselevated, and as the blades of grass grip between therib or flange 26 and the cap 15, they are cut off from light, air and water, and they will soon wither and die. Thus, the device ordinarily functions to trim the grass that is immediately adjacent to the cap 15 and head 16 When water is turned on thru the under ground pipes of the sprinkling system, said water will flow upwardly thru the opening it in disc 11, thence thru tubular member 18, and after passing thru the chamber 24, the water will discharge thru the check opening 25. Inasmuch as this jet opening is somewhat smaller in diameter than the duct thru tubular member 18, a back pressure will be developed in the water pipe thru the head, with the result that water will pass between disc 11 and ring 21 and the pressure of the water acting against said ring will force the same and the tubular member 18 and head 23 carried thereby, upwardly until the packing ring or gasket 22 bears against the seat 1'7 on the underside of cap 15.

Thus, the head 23 in which the jet opening 25 is formed, will be elevated to a position two or three inches above the surface of the lawn, where the water that discharges from the jet opening will not be interfered with by the grass or other growth on the surface of the lawn.

The packing ring or gasket 23 serves to pack the joint between ring 21 and the un derside of the cap 15, thus efliectually preventing leakage of water thru said oint and thru the joint between the tubular member 18 andcap 15.

When the flow of water thru underground distributingpipes is cut off, the elevated portion of the" head will return to its lowermost position, asillustrated in Fig. 2, and the rib or flange 26 will engage and bear on any blades of grass that may rest on top of the cap 15, thereby killing the trapped blades of grass, as hereinbefore described.

Thus, it will be seen that I have provided a lawn sprinkling head that is relatively simple in construction, inexpensive of manufacture, and which is in service, elevated so that the water is delivered onto the adjacent portion of the lawn from a point a short distance above the surface of said lawn, and consequently, from a, point where there is no interference by grass or other lawn growth.

It will be understood that minor changes in the size, form and construction of the various parts of my. improved lawn sprinkling head may be made and substituted for those herein shown and described without departing from the spirit of my invention, the scope of which is set forth in the appended claims. i

I claim as my invention:

1. In a lawn sprinkler head, a hollow member adapted to be connected to a source of water supply, a tubular member arranged to move vertically thru said hollow member, a head carried by the upper end of said tubular member, said head being provided with a jet opening and a rib formed on the underside of said head, which rib engages the top vof the hollow member when said tubular member and head are at their lower limit of movement.

2. In a lawn sprinkler head, a hollow member adapted to be connected to a source of water supply, a tubular member arranged for telescopic movement within said hollow member, a head carried by the upper end of said tubular member, said head being provided with a centrally arranged jet opening, and a marginal flange on the underside of said head, which flange engages the top of v the hollow member when the telescoping tube is at its lower limit of movement.

3. In a lawn sprinkler head, a hollow member adapted to be connected to a source of Water supply, a tubular member arranged for telescopic movement within said hollow member, a head carried by the upper end of said tubular member, said'head being provided with a centrally arranged jet opening, and a marginal flange. on the underside of said head, which flange engages the top of a the hollow member when the telescoping tube is at its lower limit of movement, ahead carried by the lower end of the telescoping tube and a packing ring carried by said last mentioned head.

In testimony whereof I aflix my signature.

CLAUDE U. TYRRELL. 

